Assertion Reason Test: Cell Cycle & Cell Division


10 Questions MCQ Test Additional Documents & Tests for NEET | Assertion Reason Test: Cell Cycle & Cell Division


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Attempt Assertion Reason Test: Cell Cycle & Cell Division | 10 questions in 10 minutes | Mock test for NEET preparation | Free important questions MCQ to study Additional Documents & Tests for NEET for NEET Exam | Download free PDF with solutions
QUESTION: 1

A: Endomitosis does not cause karyokinesis or cytokinesis.

R: In endomitosis, mitosis occurs within the nucleus.

Solution: Endomitosis involves multiplication of chromosomes without karyokinesis and cytokinesis.

QUESTION: 2

A: Synaptonemal complex develops between two synapsed homologous chromosomes.

R: Mitosis cannot be completed without the synaptonemal complex.Options~

1. If both Assertion & Reason are true, and the reason is the correct explanation of the assertion.

2. If both Assertion & Reason are true, but the reason is not the correct explanation of the assertion.

3. If the Assertion is a true statement, but Reason is false.

4. If both Assertion and Reason are false statements.


Solution:

Meiosis can not be completed without the synaptonemal complex.

 

 

QUESTION: 3

A: During anaphase-II, chromatids of a chromosome separate.

R: Centromere of a mitotic chromosome divides during anaphase.

Solution: Meiosis II and mitosis both are equational division and involve splitting of centromere at anaphase-II and anaphase respectively.

QUESTION: 4

A: Dictyotene stage occurs in females only.

R: Gametogenesis rests for a long period at the diplotene stage in females.

Solution: Dictyotene occurs in oocyctes.

QUESTION: 5

A: Each chromosome of bivalent attaches with two spindles in metaphase.

R: In metaphase, bivalents migrate towards the metaphasic plate.

Solution: Each chromosome of bivalent attachments with a single spindle in Metaphase I. In Metaphase I one chromosome from each homologous pair migrate towards the pole.

QUESTION: 6

A: G2-phase is a pre-mitotic phase.

R: Chromosomes undergo condensation in this phase.

Solution: Proteins and organelles like mitochondria and chloroplast duplicate in G2-phase.

QUESTION: 7

A: Anaphase-I is the actual phase of reduction in the number of chromosomes.

R: Homologous chromosomes move to the opposite poles with both their chromatids.

Solution: Anaphase-I involves the splitting of homologous chromosomes.

QUESTION: 8

A: Golgi bodies and ER disappear in early prophase.

R: Their reorganisation stage is anaphase.

Solution:

In mitosisprophase is the longest phase of karyokinesis.In early prophase, nuclear membranes, nucleolus start disintegrating. cells cytoskeleton, Golgi complexER, etc disappear.

Their reorganisation occurs in telophase.

 

 

QUESTION: 9

A: The complete disintegration of the nuclear envelope marks the start of metaphase.

R: Chromosomes are distinct with two chromatids at this stage.

Solution: Complete disintegration of the nuclear envelope marks the beginning of metaphase chromosomes at this phase have two distinct chromatids.

QUESTION: 10

A: Chiasmata counting stage is diplotene.

R: Dissolution of the synaptonemal complex occurs except at the sites of cross overs.

Solution: Chiasmata represents the site of crossing over.
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